<template>
  <div class="cart">
    <h4>全部商品</h4>
    <div class="cart-main">
      <div class="cart-th">
        <div class="cart-th1">全部</div>
        <div class="cart-th2">商品</div>
        <div class="cart-th3">单价（元）</div>
        <div class="cart-th4">数量</div>
        <div class="cart-th5">小计（元）</div>
        <div class="cart-th6">操作</div>
      </div>
      <div class="cart-body">
        <ul class="cart-list" v-for="cart in cartListInfo" :key="cart.skuId">
          <li class="cart-list-con1">
            <input
              type="checkbox"
              name="chk_list"
              :checked="cart.isChecked === 1"
              @change="ChangeChecked(cart.skuId, $event)"
            />
          </li>
          <li class="cart-list-con2">
            <img :src="cart.imgUrl" />
            <div class="item-msg">{{ cart.skuName }}</div>
          </li>
          <li class="cart-list-con4">
            <span class="price">{{ cart.skuPrice }}</span>
          </li>
          <li class="cart-list-con5">
            <a
              href="javascript:void(0)"
              class="mins"
              :disable="cart.skuNum == 1"
              @click="changeNum('minus', -1, cart)"
              >-</a
            >
            <input
              autocomplete="off"
              type="text"
              :value="cart.skuNum"
              minnum="1"
              class="itxt"
              @change="changeNum('change', $event.target.value * 1, cart)"
            />
            <a
              href="javascript:void(0)"
              class="plus"
              @click="changeNum('add', 1, cart)"
              >+</a
            >
          </li>
          <li class="cart-list-con6">
            <span class="sum">{{ cart.skuPrice * cart.skuNum }}</span>
          </li>
          <li class="cart-list-con7">
            <a href="#none" class="sindelet" @click="deleteCartByid(cart.skuId)"
              >删除</a
            >
            <br />
            <a href="#none">移到收藏</a>
          </li>
        </ul>
      </div>
    </div>
    <div class="cart-tool">
      <div class="select-all">
        <input
          class="chooseAll"
          type="checkbox"
          :checked="checkedAll&&cartListInfo.length>0"
          @change="Allchecked($event)"
        />
        <span>全选</span>
      </div>
      <div class="option">
        <a href="#none" @click="deleteChecked">删除选中的商品</a>
        <a href="#none">移到我的关注</a>
        <a href="#none">清除下柜商品</a>
      </div>
      <div class="money-box">
        <div class="chosed">
          已选择 <span>{{ numAll }}</span
          >件商品
        </div>
        <div class="sumprice">
          <em>总价（不含运费） ：</em>
          <i class="summoney">{{ sumAll }}</i>
        </div>
        <div class="sumbtn">
          <router-link to="/trade" class="sum-btn">结算</router-link>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import throttle from 'lodash/throttle'
import { mapGetters } from "vuex";
export default {
  name: "ShopCart",
  mounted() {
    this.getData();
  },
  methods: {
    //派发消息
    getData() {
      this.$store.dispatch("getshopCartList");
    },
    //1.改变产品数量
     changeNum:throttle(async function(type, disNum, cart){
      //改变数据派发的请求应该是6.reqAddshopCart添加商品对应方法addshopCart
      //（三个参数：类型/修改值/cart)
      //第三个参数不能是id因为需要cart.skuNum的值判断
      switch (type) {
        case "add":
          disNum = 1;
          break;
        case "minus":
          disNum=cart.skuNum>1?-1:0;
          break;
        case "change":
          //输入非法，带0不变
          if(isNaN(disNum)||disNum<=0){
            disNum=0
          }else{
           disNum=parseInt(disNum)-cart.skuNum
          }
          break;
      }
      //派发请求
      try {
        await this.$store.dispatch("addshopCart", { skuId: cart.skuId, skuNum: disNum });
        this.getData();
      } catch (error) {
        console.log('修改失败',error);
      }
    },1000) ,
    //2.删除某个产品操作
    async deleteCartByid(skuId){
      try {
        await this.$store.dispatch('deleteCartbyId',skuId)
          this.getData()
      } catch (error) {
        alert(error.message)
      }
   },
    //5.删除选中全部商品
    deleteChecked(){
      this.cartListInfo.forEach((item)=>{
        if(item.isChecked){
          this.deleteCartByid(item.skuId)
        }
      })
    },
   //3.修改产品状态信息
  async ChangeChecked(skuId,event){
   try {
    //传递给服务器的数据不应该时true/false 应该是0/1(
    let checked=event.target.checked?1:0
    await  this.$store.dispatch('CheckedbyId',{skuID:skuId,isChecked:checked})
    this.getData()
   } catch (error) {
      alert(error.message)
   }
   },
    //4.全选改变单选
  async  Allchecked(e){
     let allchecked=e.target.checked?1:0
      try {
        await this.$store.dispatch('updateAllchecked',allchecked)
        this.getData()
      } catch (error) {
        console.log(error.message)
      }
      }
   
  },
  computed: {
    ...mapGetters(["cartList"]),
    cartListInfo() {
      return this.cartList.cartInfoList || [];
    },
    //总价
    sumAll() {
      let sum = 0;
      this.cartListInfo.forEach((item) => {
        if (item.isChecked) {
          sum = item.skuPrice * item.skuNum + sum;
        }
      });
      return sum;
    },
    //商品总数
    numAll(){
     let snum=0
      this.cartListInfo.forEach((item) => {
        if (item.isChecked) {
          snum = item.skuNum + snum;
        }
      });
      return snum;
    },
    //单选改变全选
    checkedAll() {
      return this.cartListInfo.every((item) => {
        return item.isChecked;
      });
    },
  },
};
</script>



<style lang="less" scoped>
.cart {
  width: 1200px;
  margin: 0 auto;

  h4 {
    margin: 9px 0;
    font-size: 14px;
    line-height: 21px;
  }

  .cart-main {
    .cart-th {
      background: #f5f5f5;
      border: 1px solid #ddd;
      padding: 10px;
      overflow: hidden;

      & > div {
        float: left;
      }

      .cart-th1 {
        width: 25%;

        input {
          vertical-align: middle;
        }

        span {
          vertical-align: middle;
        }
      }

      .cart-th2 {
        width: 25%;
      }

      .cart-th3,
      .cart-th4,
      .cart-th5,
      .cart-th6 {
        width: 12.5%;
      }
    }

    .cart-body {
      margin: 15px 0;
      border: 1px solid #ddd;

      .cart-list {
        padding: 10px;
        border-bottom: 1px solid #ddd;
        overflow: hidden;

        & > li {
          float: left;
        }

        .cart-list-con1 {
          width: 15%;
        }

        .cart-list-con2 {
          width: 35%;

          img {
            width: 82px;
            height: 82px;
            float: left;
          }

          .item-msg {
            float: left;
            width: 150px;
            margin: 0 10px;
            line-height: 18px;
          }
        }

        .item-txt {
          text-align: center;
        }
      }

      .cart-list-con4 {
        width: 10%;
      }

      .cart-list-con5 {
        width: 17%;

        .mins {
          border: 1px solid #ddd;
          border-right: 0;
          float: left;
          color: #666;
          width: 6px;
          text-align: center;
          padding: 8px;
        }

        input {
          border: 1px solid #ddd;
          width: 40px;
          height: 33px;
          float: left;
          text-align: center;
          font-size: 14px;
        }

        .plus {
          border: 1px solid #ddd;
          border-left: 0;
          float: left;
          color: #666;
          width: 6px;
          text-align: center;
          padding: 8px;
        }
      }

      .cart-list-con6 {
        width: 10%;

        .sum {
          font-size: 16px;
        }
      }

      .cart-list-con7 {
        width: 13%;

        a {
          color: #666;
        }
      }
    }
  }
}

.cart-tool {
  overflow: hidden;
  border: 1px solid #ddd;

  .select-all {
    padding: 10px;
    overflow: hidden;
    float: left;

    span {
      vertical-align: middle;
    }

    input {
      vertical-align: middle;
    }
  }

  .option {
    padding: 10px;
    overflow: hidden;
    float: left;

    a {
      float: left;
      padding: 0 10px;
      color: #666;
    }
  }

  .money-box {
    float: right;

    .chosed {
      line-height: 26px;
      float: left;
      padding: 0 10px;
    }

    .sumprice {
      width: 200px;
      line-height: 22px;
      float: left;
      padding: 0 10px;

      .summoney {
        color: #c81623;
        font-size: 16px;
      }
    }

    .sumbtn {
      float: right;

      a {
        display: block;
        position: relative;
        width: 96px;
        height: 52px;
        line-height: 52px;
        color: #fff;
        text-align: center;
        font-size: 18px;
        font-family: "Microsoft YaHei";
        background: #e1251b;
        overflow: hidden;
      }
    }
  }
}
</style>